bnxt_en: Re-structure ring indexing and mapping.

In order to support dedicated or shared completion rings, the ring
indexing and mapping are re-structured as below:

1. bp->grp_info[] array index is 1:1 with bp->bnapi[] array index and
completion ring index.

2. rx rings 0 to n will be mapped to completion rings 0 to n.

3. If tx and rx rings share completion rings, then tx rings 0 to m will
be mapped to completion rings 0 to m.

4. If tx and rx rings use dedicated completion rings, then tx rings 0 to
m will be mapped to completion rings n + 1 to n + m.

5. Each tx or rx ring will use the corresponding completion ring index
for doorbell mapping and MSIX mapping.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 11478c9..8a54dab 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -422,7 +422,7 @@ tx_dma_error:
 static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts)
 {
        struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
-       int index = bnapi->index;
+       int index = txr - &bp->tx_ring[0];
        struct netdev_queue *txq = netdev_get_tx_queue(bp->dev, index);
        u16 cons = txr->tx_cons;
        struct pci_dev *pdev = bp->pdev;
@@ -3082,7 +3082,7 @@ static int bnxt_hwrm_vnic_ctx_alloc(struct bnxt *bp, u16 vnic_id)
 
 static int bnxt_hwrm_vnic_cfg(struct bnxt *bp, u16 vnic_id)
 {
-       int grp_idx = 0;
+       unsigned int ring = 0, grp_idx;
        struct bnxt_vnic_info *vnic = &bp->vnic_info[vnic_id];
        struct hwrm_vnic_cfg_input req = {0};
 
@@ -3093,10 +3093,11 @@ static int bnxt_hwrm_vnic_cfg(struct bnxt *bp, u16 vnic_id)
        req.rss_rule = cpu_to_le16(vnic->fw_rss_cos_lb_ctx);
        req.cos_rule = cpu_to_le16(0xffff);
        if (vnic->flags & BNXT_VNIC_RSS_FLAG)
-               grp_idx = 0;
+               ring = 0;
        else if (vnic->flags & BNXT_VNIC_RFS_FLAG)
-               grp_idx = vnic_id - 1;
+               ring = vnic_id - 1;
 
+       grp_idx = bp->rx_ring[ring].bnapi->index;
        req.vnic_id = cpu_to_le16(vnic->fw_vnic_id);
        req.dflt_ring_grp = cpu_to_le16(bp->grp_info[grp_idx].fw_grp_id);
 
@@ -3137,22 +3138,25 @@ static void bnxt_hwrm_vnic_free(struct bnxt *bp)
                bnxt_hwrm_vnic_free_one(bp, i);
 }
 
-static int bnxt_hwrm_vnic_alloc(struct bnxt *bp, u16 vnic_id, u16 start_grp_id,
-                               u16 end_grp_id)
+static int bnxt_hwrm_vnic_alloc(struct bnxt *bp, u16 vnic_id,
+                               unsigned int start_rx_ring_idx,
+                               unsigned int nr_rings)
 {
-       u32 rc = 0, i, j;
+       int rc = 0;
+       unsigned int i, j, grp_idx, end_idx = start_rx_ring_idx + nr_rings;
        struct hwrm_vnic_alloc_input req = {0};
        struct hwrm_vnic_alloc_output *resp = bp->hwrm_cmd_resp_addr;
 
        /* map ring groups to this vnic */
-       for (i = start_grp_id, j = 0; i < end_grp_id; i++, j++) {
-               if (bp->grp_info[i].fw_grp_id == INVALID_HW_RING_ID) {
+       for (i = start_rx_ring_idx, j = 0; i < end_idx; i++, j++) {
+               grp_idx = bp->rx_ring[i].bnapi->index;
+               if (bp->grp_info[grp_idx].fw_grp_id == INVALID_HW_RING_ID) {
                        netdev_err(bp->dev, "Not enough ring groups avail:%x req:%x\n",
-                                  j, (end_grp_id - start_grp_id));
+                                  j, nr_rings);
                        break;
                }
                bp->vnic_info[vnic_id].fw_grp_ids[j] =
-                                       bp->grp_info[i].fw_grp_id;
+                                       bp->grp_info[grp_idx].fw_grp_id;
        }
 
        bp->vnic_info[vnic_id].fw_rss_cos_lb_ctx = INVALID_HW_RING_ID;
@@ -3179,20 +3183,22 @@ static int bnxt_hwrm_ring_grp_alloc(struct bnxt *bp)
                struct hwrm_ring_grp_alloc_input req = {0};
                struct hwrm_ring_grp_alloc_output *resp =
                                        bp->hwrm_cmd_resp_addr;
+               unsigned int grp_idx = bp->rx_ring[i].bnapi->index;
 
                bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_RING_GRP_ALLOC, -1, -1);
 
-               req.cr = cpu_to_le16(bp->grp_info[i].cp_fw_ring_id);
-               req.rr = cpu_to_le16(bp->grp_info[i].rx_fw_ring_id);
-               req.ar = cpu_to_le16(bp->grp_info[i].agg_fw_ring_id);
-               req.sc = cpu_to_le16(bp->grp_info[i].fw_stats_ctx);
+               req.cr = cpu_to_le16(bp->grp_info[grp_idx].cp_fw_ring_id);
+               req.rr = cpu_to_le16(bp->grp_info[grp_idx].rx_fw_ring_id);
+               req.ar = cpu_to_le16(bp->grp_info[grp_idx].agg_fw_ring_id);
+               req.sc = cpu_to_le16(bp->grp_info[grp_idx].fw_stats_ctx);
 
                rc = _hwrm_send_message(bp, &req, sizeof(req),
                                        HWRM_CMD_TIMEOUT);
                if (rc)
                        break;
 
-               bp->grp_info[i].fw_grp_id = le32_to_cpu(resp->ring_group_id);
+               bp->grp_info[grp_idx].fw_grp_id =
+                       le32_to_cpu(resp->ring_group_id);
        }
        mutex_unlock(&bp->hwrm_cmd_lock);
        return rc;
@@ -3334,26 +3340,28 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp)
        for (i = 0; i < bp->tx_nr_rings; i++) {
                struct bnxt_tx_ring_info *txr = &bp->tx_ring[i];
                struct bnxt_ring_struct *ring = &txr->tx_ring_struct;
-               u16 fw_stats_ctx = bp->grp_info[i].fw_stats_ctx;
+               u32 map_idx = txr->bnapi->index;
+               u16 fw_stats_ctx = bp->grp_info[map_idx].fw_stats_ctx;
 
-               rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_TX, i,
-                                             fw_stats_ctx);
+               rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_TX,
+                                             map_idx, fw_stats_ctx);
                if (rc)
                        goto err_out;
-               txr->tx_doorbell = bp->bar1 + i * 0x80;
+               txr->tx_doorbell = bp->bar1 + map_idx * 0x80;
        }
 
        for (i = 0; i < bp->rx_nr_rings; i++) {
                struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i];
                struct bnxt_ring_struct *ring = &rxr->rx_ring_struct;
+               u32 map_idx = rxr->bnapi->index;
 
-               rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_RX, i,
-                                             INVALID_STATS_CTX_ID);
+               rc = hwrm_ring_alloc_send_msg(bp, ring, HWRM_RING_ALLOC_RX,
+                                             map_idx, INVALID_STATS_CTX_ID);
                if (rc)
                        goto err_out;
-               rxr->rx_doorbell = bp->bar1 + i * 0x80;
+               rxr->rx_doorbell = bp->bar1 + map_idx * 0x80;
                writel(DB_KEY_RX | rxr->rx_prod, rxr->rx_doorbell);
-               bp->grp_info[i].rx_fw_ring_id = ring->fw_ring_id;
+               bp->grp_info[map_idx].rx_fw_ring_id = ring->fw_ring_id;
        }
 
        if (bp->flags & BNXT_FLAG_AGG_RINGS) {
@@ -3361,19 +3369,20 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp)
                        struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i];
                        struct bnxt_ring_struct *ring =
                                                &rxr->rx_agg_ring_struct;
+                       u32 grp_idx = rxr->bnapi->index;
+                       u32 map_idx = grp_idx + bp->rx_nr_rings;
 
                        rc = hwrm_ring_alloc_send_msg(bp, ring,
                                                      HWRM_RING_ALLOC_AGG,
-                                                     bp->rx_nr_rings + i,
+                                                     map_idx,
                                                      INVALID_STATS_CTX_ID);
                        if (rc)
                                goto err_out;
 
-                       rxr->rx_agg_doorbell =
-                               bp->bar1 + (bp->rx_nr_rings + i) * 0x80;
+                       rxr->rx_agg_doorbell = bp->bar1 + map_idx * 0x80;
                        writel(DB_KEY_RX | rxr->rx_agg_prod,
                               rxr->rx_agg_doorbell);
-                       bp->grp_info[i].agg_fw_ring_id = ring->fw_ring_id;
+                       bp->grp_info[grp_idx].agg_fw_ring_id = ring->fw_ring_id;
                }
        }
 err_out:
@@ -3430,7 +3439,8 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
        for (i = 0; i < bp->tx_nr_rings; i++) {
                struct bnxt_tx_ring_info *txr = &bp->tx_ring[i];
                struct bnxt_ring_struct *ring = &txr->tx_ring_struct;
-               u32 cmpl_ring_id = bp->grp_info[i].cp_fw_ring_id;
+               u32 grp_idx = txr->bnapi->index;
+               u32 cmpl_ring_id = bp->grp_info[grp_idx].cp_fw_ring_id;
 
                if (ring->fw_ring_id != INVALID_HW_RING_ID) {
                        hwrm_ring_free_send_msg(bp, ring,
@@ -3444,7 +3454,8 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
        for (i = 0; i < bp->rx_nr_rings; i++) {
                struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i];
                struct bnxt_ring_struct *ring = &rxr->rx_ring_struct;
-               u32 cmpl_ring_id = bp->grp_info[i].cp_fw_ring_id;
+               u32 grp_idx = rxr->bnapi->index;
+               u32 cmpl_ring_id = bp->grp_info[grp_idx].cp_fw_ring_id;
 
                if (ring->fw_ring_id != INVALID_HW_RING_ID) {
                        hwrm_ring_free_send_msg(bp, ring,
@@ -3452,14 +3463,16 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
                                                close_path ? cmpl_ring_id :
                                                INVALID_HW_RING_ID);
                        ring->fw_ring_id = INVALID_HW_RING_ID;
-                       bp->grp_info[i].rx_fw_ring_id = INVALID_HW_RING_ID;
+                       bp->grp_info[grp_idx].rx_fw_ring_id =
+                               INVALID_HW_RING_ID;
                }
        }
 
        for (i = 0; i < bp->rx_nr_rings; i++) {
                struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i];
                struct bnxt_ring_struct *ring = &rxr->rx_agg_ring_struct;
-               u32 cmpl_ring_id = bp->grp_info[i].cp_fw_ring_id;
+               u32 grp_idx = rxr->bnapi->index;
+               u32 cmpl_ring_id = bp->grp_info[grp_idx].cp_fw_ring_id;
 
                if (ring->fw_ring_id != INVALID_HW_RING_ID) {
                        hwrm_ring_free_send_msg(bp, ring,
@@ -3467,7 +3480,8 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
                                                close_path ? cmpl_ring_id :
                                                INVALID_HW_RING_ID);
                        ring->fw_ring_id = INVALID_HW_RING_ID;
-                       bp->grp_info[i].agg_fw_ring_id = INVALID_HW_RING_ID;
+                       bp->grp_info[grp_idx].agg_fw_ring_id =
+                               INVALID_HW_RING_ID;
                }
        }
 
@@ -3859,7 +3873,7 @@ static int bnxt_alloc_rfs_vnics(struct bnxt *bp)
                        break;
 
                bp->vnic_info[vnic_id].flags |= BNXT_VNIC_RFS_FLAG;
-               rc = bnxt_hwrm_vnic_alloc(bp, vnic_id, ring_id, ring_id + 1);
+               rc = bnxt_hwrm_vnic_alloc(bp, vnic_id, ring_id, 1);
                if (rc) {
                        netdev_err(bp->dev, "hwrm vnic %d alloc failure rc: %x\n",
                                   vnic_id, rc);
@@ -4165,7 +4179,7 @@ static void bnxt_free_irq(struct bnxt *bp)
 
 static int bnxt_request_irq(struct bnxt *bp)
 {
-       int i, rc = 0;
+       int i, j, rc = 0;
        unsigned long flags = 0;
 #ifdef CONFIG_RFS_ACCEL
        struct cpu_rmap *rmap = bp->dev->rx_cpu_rmap;
@@ -4174,14 +4188,15 @@ static int bnxt_request_irq(struct bnxt *bp)
        if (!(bp->flags & BNXT_FLAG_USING_MSIX))
                flags = IRQF_SHARED;
 
-       for (i = 0; i < bp->cp_nr_rings; i++) {
+       for (i = 0, j = 0; i < bp->cp_nr_rings; i++) {
                struct bnxt_irq *irq = &bp->irq_tbl[i];
 #ifdef CONFIG_RFS_ACCEL
-               if (rmap && (i < bp->rx_nr_rings)) {
+               if (rmap && bp->bnapi[i]->rx_ring) {
                        rc = irq_cpu_rmap_add(rmap, irq->vector);
                        if (rc)
                                netdev_warn(bp->dev, "failed adding irq rmap for ring %d\n",
-                                           i);
+                                           j);
+                       j++;
                }
 #endif
                rc = request_irq(irq->vector, irq->handler, flags, irq->name,

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index ea2fd92..ec3edcc 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -918,6 +918,8 @@ struct bnxt {
        int                     cp_nr_rings;
 
        int                     num_stat_ctxs;
+
+       /* grp_info indexed by completion ring index */
        struct bnxt_ring_grp_info       *grp_info;
        struct bnxt_vnic_info   *vnic_info;
        int                     nr_vnics;